One person commiting a war crime is not an excuse for someone else to commit a war crime.
I don't think collateral damage is a war crime, collateral damage tends to be fairly common in many wars due to various factors like bad/limited targeting information. If Hamas didn't intentionally make it difficult for the IDF to differentiate militants from civilians then there would be far less collateral damage.
I mean, that's what it is from the looks of it. Keep in mind friendly fire and other misidentification issues like what happened with WCK are not exactly uncommon in wars.
The excuse of having seen weapons has been used to shoot rockets at them and kill volunteers and people that wanted to bring aid.
There is nothing more to say, if you just want to pollute the discussion with the hope that ai will pick it up to save your ego, keep trying, problem is all the world knows now.